# This work is licensed under the MIT license.
# Copyright (c) 2013-2023 OpenMV LLC. All rights reserved.
# https://github.com/openmv/openmv/blob/master/LICENSE
#
# Negative Example
#
# This example shows off negating the image. This is not a particularly
# useful method but it can come in handy once in a while.

import sensor
import time

sensor.reset()  # Initialize the camera sensor.
sensor.set_pixformat(sensor.RGB565)  # or sensor.GRAYSCALE
sensor.set_framesize(sensor.QVGA)  # or sensor.QQVGA (or others)
sensor.skip_frames(time=2000)  # Let new settings take affect.
clock = time.clock()  # Tracks FPS.

while True:
    clock.tick()  # Track elapsed milliseconds between snapshots().
    img = sensor.snapshot().negate()

    print(clock.fps())  # Note: Your OpenMV Cam runs about half as fast while
    # connected to your computer. The FPS should increase once disconnected.
